There has been quite a bit of advertising about FNB Connect, one of the more interesting offers they have is their VoIP which includes incoming calls and a good range of desktop and cellphone applications to use it.

The FNB client uses IAX (not SIP) with an endpoint of voice.fnbconnect.co.za. This is fantastic as it makes life very easy to incorporate it with Asterisk. The following setup is used on our Joburg branch to provide a local breakout.

iax.conf

register => 087<mynumber>:<mypassword>@voice.fnbconnect.co.za

[fnb]
type=peer
host=voice.fnbconnect.co.za
username=087<mynumber>
secret=<mypassword>

[087<mynumber>]
type=user
host=dynamic

Now to route some calls out of there

extensions.conf

[local]
<my local stuff goes here>
exten => 087<mynumber>,1,DIAL(SIP/<my extension>)

[default]
exten => s,1,DIAL(SIP/<my extension>)

<snip>

[outbound]
exten => _X.,1,DIAL(IAX2/fnb/${EXTEN})

FNB's calls come in as "s@default" so you need a 'default' context to route incoming calls to your local call group or extension.

After publishing this information someone at FNB also pointed out that their cluster supports G729 and trunking. Switching to G729 where available should greatly improve voice quality.